interchanging the matrix element between two matrix to produce offsprings?

Question

Arunachalam D 2015-6-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/223683-interchanging-the-matrix-element-between-two-matrix-to-produce-offsprings

编辑： Martin Seliga 2018-4-18

i have two parents

p1=[2 3 4 5 1 6 7 9 8 10]
p2=[1 3 5 6 7 8 9 10 2 4]

step 1:

here i wanna change in-between values by crossing [5 1 6 7] and [6 7 8 9] of p1 and p2 respectively

off1=[* * * 6 7 8 9 * * *]
off2=[* * * 5 1 6 7 * * *]

step 2:

then select values not in the crossing operation and such as [2 3 4 10] and change * if previously exist by comparing p1 and p2 to make off1 and off2.

off1=[2 3 4 6 7 8 9 * * 10]
off2=[* 3 * 5 1 6 7 10 3 4]

the remaining values are swapped based on interchange in first step 5=6;1=7;6=8;7=9 then swapped to other value if one of the number existing in p1 and p2. for eg we have 9 and 8 at p1 which remains *. it should be swapped based on step1 condition given above (5=6;1=7;6=8;7=9) so 9 replaced by 7 and 8 replaced by 6. similarly for off2

off1=[2 3 4 6 7 8 9 7 8 10]
off2=[7 3 8 5 1 6 7 10 3 4]

here when selecting 8 conflict exists 5=6 but 6 already existing so 6=8 is considered and changed accordingly.

help me in coding this...

thank you

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Answer 1

Martin Seliga 2018-4-18

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/223683-interchanging-the-matrix-element-between-two-matrix-to-produce-offsprings#answer_315925

编辑：Martin Seliga 2018-4-18

在 MATLAB Online 中打开

Hi.

I think you don't need this anymore, but maybe someone will searching for the solution. Here is the code:

 function [childA, childB] = crossover(parentA, parentB)
    n = length(parentA);
    childA = zeros(1,n);
    childB = zeros(1,n);
    x1 = randperm(n,1);
    x2 = randperm(n-x1,1)+x1;
    childA(x1:x2) = parentB(x1:x2);
    childB(x1:x2) = parentA(x1:x2);

    for i = 1:x2-x1+1
        mapRelation(1:2,i)=[childA(x1+i-1), childB(x1+i-1)];
    end

    for i = 1:x1-1
        if(length(find(childA == parentA(i))) < 1)
            childA(i) = parentA(i);
        end
        if(length(find(childB == parentB(i))) < 1)
            childB(i) = parentB(i);
        end
    end

    for i = x2+1:n
        if(isempty(find(childA == parentA(i),1)))
            childA(i) = parentA(i);
        end
        if(isempty(find(childB == parentB(i),1)))
            childB(i) = parentB(i);
        end
    end

    while(~isempty(find(childA == 0,1)))
        mapA = mapRelation;
        i = find(childA == 0,1);
        v = parentA(i);
        while (~isempty(find(mapA == v,1)))
            [j, k] = find(mapA == v,1);
            if (j == 1)
                v = mapA(2,k);
            else
                v = mapA(1,k);
            end
            mapA(:,k) = [];
        end
        childA(i) = v;
    end

    while(~isempty(find(childB == 0,1)))
        mapB = mapRelation;
        i = find(childB == 0,1);
        v = parentB(i);
        while (~isempty(find(mapB == v,1)))
            [j, k] = find(mapB == v,1);
            if (j == 1)
                v = mapB(2,k);
            else
                v = mapB(1,k);
            end
            mapB(:,k) = [];
        end
        childB(i) = v;
    end
end